Building a Monitoring Infrastructure with Nagios by David Josephsen

By David Josephsen

Build real-world, end-to-end community tracking options with Nagios


This is the definitive advisor to development reasonably cheap, enterprise-strength tracking infrastructures with Nagios, the world’s prime open resource tracking software. community tracking expert David Josephsen is going a long way past the fundamentals, demonstrating the way to use third-party instruments and plug-ins to unravel the categorical difficulties on your particular atmosphere. Josephsen introduces Nagios “from the floor up,” exhibiting how you can plan for achievement and leverage today’s Most worthy tracking top practices. Then, utilizing functional examples, actual directives, and dealing code, Josephsen offers designated tracking suggestions for home windows, Unix, Linux, community gear, and different systems and units. You’ll locate thorough discussions of complex issues, together with using facts visualization to unravel advanced tracking difficulties. this can be additionally the 1st Nagios ebook with finished insurance of utilizing Nagios occasion dealer to remodel and expand Nagios.

  • Understand how Nagios works, intensive: the host and repair paradigm, plug-ins, scheduling, and notification
  • Configure Nagios effectively: config records, templates, timeperiods, contacts, hosts, prone, escalations, dependencies, and extra
  • Streamline deployment with scripting templates, automatic discovery, and Nagios GUI instruments
  • Use plug-ins and instruments to systematically display screen the units and structures you want to display screen, how you have to computer screen them
  • Establish front-ends, visible dashboards, and administration interfaces with MRTG and RRDTool
  • Build new C-based Nagios occasion dealer (NEB) modules, one step at a time
  • Contains easy-to-understand code listings in Unix shell, C, and Perl


If you’re accountable for platforms tracking infrastructure in any association, huge or small, this ebook can assist you in attaining the consequences you want–right from the beginning.


David Josephsen is Senior structures Engineer at DBG, Inc., the place he continues a set of geographically dispersed server farms. He has greater than a decade of hands-on adventure with Unix platforms, routers, firewalls, and cargo balancers in aid of complicated, high-volume networks. Josephsen’s certifications contain CISSP, CCNA, CCDA, and MCSE. His co-authored paintings on Bayesian unsolicited mail filtering earned a most sensible Paper award at USENIX LISA 2004. He has been released in either ;login and Sysadmin magazines on subject matters when it comes to safeguard, structures tracking, and junk mail mitigation.


Introduction bankruptcy 1 top Practices bankruptcy 2 concept of Operations bankruptcy three fitting Nagios bankruptcy four Configuring Nagios bankruptcy five Bootstrapping the Configs bankruptcy 6 observing bankruptcy 7 Visualization bankruptcy eight Nagios occasion dealer Interface APPENDIX A Configure concepts APPENDIX B nagios.cfg and cgi.cfg APPENDIX C Command-Line strategies Index


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If the Web proxy service goes down, Nagios should not check on, or notify, the Web service. This is exactly what dependency relationships do. 1 Nagios uses dependency definitions to track interdependent services. The Down Side of Hosts and Services In my opinion, the manner in which Nagios naturally handles the host and services paradigm is genius. It is simple to understand, always does what you would expect, and makes things generally easy to manage. However, the hosts and services assumption also limits Nagios’ functionality, to some degree.

This sums up Nagios’ intended purpose. Nagios is a framework that allows you to intelligently schedule little monitoring programs written in any language you choose. Each little monitoring program, or plugin, reports its status back to Nagios, and Nagios tracks the status of the plugins to make sure the right people get notified and to provide escalations, if necessary. It also keeps track of the dates and times that various plugins changed states and has nice built-in historical reporting capabilities.

So the location of the monitoring system within the network topology becomes an important implementation detail. 1 The router between Nagios and Server1 introduces a dependency and some network overhead in the form of layer 3 routing decisions. In addition to minimizing layer 3 routing of traffic from the monitoring host, you also want to make sure that the monitoring host is sending as little traffic as possible. This means paying attention to things such as polling intervals and plugin redundancy.

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